Auditory information processing for sound perception and vocalization in case
of tritone paradox

Honorata HAFKE
Adam Mickiewicz University, Institute of Acoustics

The aim of this paper is to answer the question whether
"perception-action" dissociation, which is well-documented in vision, may also
be found in auditory information processing in case of the tritone paradox. Two
experiments were conducted. Sounds with the ambiguous pitch were utilized. They
were precisely classified as a note (eg. C, C#, F#), but equivocal as to octave.
In the experiment A, participants were asked to aurally estimate pitch shifts of
sounds divided by the interval of tritone. In the experiment B, participants
were asked to reproduce a pair of tritones, by singing the vowel "a". Results of
the two experiments were compared, in order to determine if task specification -
perceptive (experiment A) or motor (experiment B) - can cause dissimilar
results.